//public class demo1 {
//
//    public static void main(String[] args) {
////        int a = 10;
////        Integer b = (Integer) a; //自动装箱
////        Integer c = Integer.valueOf(a);  //手动装箱
////
////        System.out.println(a);
////        System.out.println(b);
////        System.out.println(c);
//
////        Integer a = new Integer(10);
////        int b = (int) a;  //自动拆箱
////        int c = a.intValue();  //手动拆箱
//
//
////        Integer a = -2;
////        Integer b = -2;
////        System.out.println(a==b); //true
////
////
////
////        Integer c = 200;
////        Integer d = 200;
////        System.out.println(c==d); //false
//
//
//
//    }
//
//
//
//
//}
